Speaker box includes auxiliary sound cavity used as resonator

Abstract

A speaker box is provided in the present disclosure. The speaker box comprises a shell, a speaker, a sound guiding channel, an auxiliary sound cavity, a baffle and a cover plate. The diaphragm separates the receiving space into a front sound cavity and a rear cavity, the sound guiding channel connects the front sound cavity with the outside and forms a front cavity. The auxiliary sound cavity is provided with a first through hole communicating with the front cavity and a second through hole communicating with the outside, and the baffle is completely covered the first through hole. The baffle is provided with a channel therethrough and the auxiliary sound cavity is communicated with the front cavity through the channel. The cover plate completely covers the second through hole. Compared with the related art, the high frequency acoustic performance of the speaker box of the present disclosure is excellent.

Description

FIELD OF THE DISCLOSURE[0001]The present disclosure relates to electro-acoustic transducers, and more particularly to a speaker box used in a portable electronic device, like a mobile phone.DESCRIPTION OF RELATED ART[0002]With the arrival of the mobile internet era, a drastically increasing number of smart mobile devices are being used. However, in all these mobile devices, mobile phone are the most common and most portable mobile terminal devices undoubtedly. Currently, there are diverse functions of the mobile phone, and one of the important functions is the high-quality music function. Therefore, the speaker boxes used to play music are widely applied to conventional smart mobile devices.[0003]The speaker box of the related art comprises a shell having a receiving space, a speaker accommodated in the shell and a sound guiding channel formed in the receiving space. The speaker comprises a diaphragm for vibrating and radiating sound, which separates the receiving space into a front...

AI Technical Summary

Benefits of technology

[0025]Compared with the relevant art, the speaker box of the present disclosure provides the auxiliary sound cavity 4 communicated with the front cavity 102 in the shell 1, so that the auxiliary sound cavity 4 acts as a part of the front cavity 102 and acts as a resonant cavity, on the one hand, it effectively increases the cavity volume of the front cavity, improves the high frequency acoustic performance, on the other hand, the structure design of the auxiliary sound cavity is more flexible and diverse, and the applicability is higher, and the above structure can effectively reduce the Q value (quality factor value) and sensitivity of the high frequency resonance peak of the speaker box, which makes the acoustic performance of the speaker box more excellent.

Problems solved by technology

However, in the speaker box of the related art, the space of the front cavity is confined to the area opposite to the dome and the sound guiding channel region, the structure of the speaker box is monotonous and unsuitable for optimal design, the high frequency acoustical performance is limited.

Excessive high frequency response leads to poor sound quality, such as harsh sound, sharp lip sound and teeth sound, and other poor sound performance.

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